Norwalk, Connecticut.
MLA
Sanborn-Perris Map Co., issuing body. Norwalk, Connecticut. 1891. https://collections.library.yale.edu/catalog/11580354.
APA, 6th edition
Sanborn-Perris Map Co., issuing body. (1891). Norwalk, Connecticut. [Atlases--Connecticut--Norwalk--1891, Cadastral maps--Connecticut--Norwalk--1891, Fire insurance maps--Connecticut--Norwalk--1891]. https://collections.library.yale.edu/catalog/11580354.